Fluid coating machine



Dec. 7, 1943. J. F. SMITH FLUID COATING MACHINE Filed May 3, 1941 3 Sheets-Sheet l I EYQHMSM Dec. 7, 1943. J. F. SMITH FLUI D COATING MACHINE Filed Ma s 1941 5 Sheets-Sheet 2- Dec. 7, 1943. J. F. SMITH 2,336,042

FLUID COATING MACHINE Filed May 3, 1941 3 Sheets-Sheet 3 giLTh/hgy m wfw Patented Dec. 7, 1943 UNITED STATES PATENT OFFICE 2,336,042 FLU ID COATING MACHINE John Frederick 'S m ith, Quincy, Mass, assignor to Compo Shoe Machinery, Corporation, Boston,

Mass, a corporation of Delaware Application May 3; 1941 sen-(111%. 391,738

(oi. it-s) 15 Claims.

This invention relates to fluid coating machines of the kind used in the manufacture of footwear, and more particularly to a machine forcoating a lasted shoe bottom with a cement prior to the sole affixing operation. 7 v} 7 n A general object of the invention isto provide a fluid coating machine having improved features of construction which will greatly reduce operating costs and which will keep the machine in an operating condition with minimum attention.

A further object of the invention is to pro vide an improved coating applicator of the flexible extrusionnozzle type in which the degree of flexibility may be varied at will to suit a particular operator and the work at hand. I A further object of the invention is to provide an improved enclosure for the complete exude; ing nozzle and its associated operating] parts which will allow'same to be emers'ed in a suitable solvent or in contact with the fumes therefrom during periods of non-operation for the purpose of keeping cement at the extruding outlets from hardening and to remove any deposits of cement which may accumulate on the various nozzle parts during the cement coating operation.

A still further object of the invention isto provide simple yet effective supporting mechanism for the extr-uding nozzle which will allow an operatorto' release same from its operating posttionfo-r movement to a position where it is disconnected from its operating devices so that it can be placed in the solvent enclosure without removing either the nozzle or the solvent eniclosure from its support, and without the' ex ercise of any great mechanical skill or knowledge.

The invention accordingly comprises the features of construction, combination oi? elements, andarrangement of parts, -which will be exem plified: in the description hereinafter set forth and the scope of the invention will be indicated connection with the accompanying drawmgsm;

which: V I

Fig. 1 is a side elevation of the machine, part of the support being broken away;

"Fig. 2 is a front elevation of the machine; part of the supportbe'ing broken away;

Fig. 3 is a pa'rtial plan view taken along lines 3 -3 of Fig. zgthejnozzle being shownin the operative: position and parts being omitted-for Fig. 4 is a partial plan view similar .tdFig, 3, but the nozzle is shown in the inoperative position and isplaced in the solvent cu'p;

Fig. 5 is a front elevation ,o f Fig. 4, the solvent cup being insection takenfalon'g lines 5 5 of Fig. {1, and swinging movement of the nozzle indicated in dotted lines; I M n I Fig. 6 is a fragmentary sideelevation of 5, the solvent cup being in section to show position of the nozzle; g H Fig. 7 is a part sectional detailoft'he nozzle and its support taken along lines :l-" 1 ofFig. 8

Fig, 8vis a front elevation of the nozzle showing parts i greater de ails. t t

Fig. 9 is a sectional side elevation of Fig. 8. taken along lines 8-,8. v n V I i Fig. 10 is a frag'mentary sectional view taken alonglines I0 --lll oiFig. l; and

, 'Fig llis a fragmentary View partly in section showing the valve operating shaft as viewed from the right of 10. I

7 Referring o thedrawings, there is shewn a fluid coating machine for applying cement to shoe bottoms which comprises asepp' rt l0 having a frame bolted to its upper end. Preferably a fluid receptacle l2 cast as an i ntegral part of the frame, and mayhave a finer cap I3 and a sight level indicator 14 attached to the frame for communication with the receptacle. The frame has a recess 15 cast in ts rear face which serves as ahousing for a worm" l6 and a worm wheel H, which are in turn suitably mounted and keyed to shafts l8 and I9 respectively, which are journalled in proper relation "in the frame.

At one end or the worm shaft 18 a mine? 20" is afiixed and arranged to be belted to a motor and pulley 2| (Fig. -1) which is adjustably mounted on studs 22 secured to the frame at 23. The worm wheel is provided with an extensionffl which serves asfa coupling to drive a gear 'pressure pump 25 removably secured to t e-tranch thescrews 2-6, while the: flange ZT-Q'f the pump serves as a cover for the" gear housing f-li. The lower supporting a s- 8 of the pu'" r hollow core 29 eiiten g flange to the: suction side of the -g this core communicates with a =Si-llli the frame leading from the-fluid receptacle to the pump flange face.; V

The end of the worm w eel shaft "1' 9 opposite to the pump has s'ecur'ed't eretoa evel which mesheswith a feed ge rfeed-wheel shaft 33 whichis-suitabl y jeurfianed inth bra'li et 34 secured'to the frame with screws. The upper end of shaft 33 has adjustably secured thereto by means of a set screw 36 a feed wheel 35 which is adapted to transport a shoe 8 held thereagainst, the driving gears 3| and 32 being kept in proper mating relation by the shoulders of the gears 3| and I7 confining the lateral movement of the shaft l9, and by a collar 31 setscrewed to the shaft 33 being confined between opposite faces of a slot 38 in the bracket 34.

In general operation of the machine, the motor 2| runs constantly, driving the pulley 20 and the worm l6, which in turn imparts rotation to the shaft l9, thus driving the feed wheel 35 through the bevel gears 3|: and 32, and alsothe' The pump is equipped with the usual pump 25.

which are securely held in position by the cap nut 65. Located directly below the pivotal cnnection of the nozzle body to its support 4| is a valve 56 having a flattened projection 61. A suitable collar 68 located between the face of the body 60 and a washer 59 locked to the valve by a screw prevents movement of the valve away from its seat in the tapered bore, but yet allows the valve to be rotated between on and off positions to connect or disconnect'the fiuid'passages 1| and 12 which connect with a passage 13 in the nozzle support affording communication with the bore 44 in the support.

by-pass valve, so that a constant pressure ismaintained in the discharge conduit 39 which I supplies fluid to the extruding nozzle hereinafter described.

The front end of the bracket 34 is provided with a milled groove 40 (Fig. 3) in which a nozzle support 41 preferably in the form of a square bar is slidably mounted, and it is retained in position by the side walls of the groove, and also we cap or cover plate 42 secured to the top of the side walls of the groove by the screws 43 (Fig. 6) A bore 44 extending from the rear end of the support and almost entirely throughout the length of same is shouldered at 45 (best shown in Fig. '7) which serves as a seat for a compression spring 46 located within the bore. The opposite end of the spring seats against a stop plate 41 secured to the bracket 34, thus the spring urges the support away from the stop plate. A portion of the bore which is reduced in diameter beyond the shoulder is threaded to receive a stud 48 which passes through a hole in the stop plate 41, while the opposite end of the stud is threaded to receive nuts 49 which act as a stop to limit forward movement of the nozzle supportunder the pressure of the spring.

When the nuts 49 contact the stop plate 41, the inoperative position of the nozzle (generally designated 50) is defined.

To locate and define theoperative position of the nozzle 53, its-support 4| is provided with a slot 5| to receive a detent plunger; The detent plunger is mounted in a form of bell crank lever 52 pivoted on the bracket at 53, the vertical arm of the lever terminating in a boss 54 having a bore therein to receive the detent plunger 55, the body of which isreduced in diameter to pass througha reduced bore on one face of the lever.

A spring 56 is positioned between the shoulder in.

the bore of the lever bo-ssand a shoulder formed on the detent plunger which serves to give the detent plunger a bias towards the nozzle support, and a suitable hand knob 5'|-is threaded to an extension'of the detent plunger to retain same and to serve as a convenient operating knob.

To "variably position the detent plungeralong the path of the slidable nozzle support, the horizontal arm of thelever 52 is forked to locate between flanges turned integral with an adjusting screw 58, which is threaded in the bracket 34, and rotationof the screw 58 turns the lever 52 on its pivot to vary the position of the detent plunger with respect to its engaging slot 5|. H I I Referring to Figs. 7, 8, and 9, there is shown an extruding nozzle assembly 50 comprising a body Gilhaving a borev 6| therein which is adapted to;

fit snugly but rotatably on a shaft .62 turned on the support 4| and is secured from lateral motion byr eine pos tio b ween. e ar Y63 and 6 .15.;

1}. series of extruding fingers 14 are pivotally mounted on a stud 15 which is snugly fitted in a bore in the body and is locked in place by a nut 8| threaded to the stud. The fingers are kept in lateral relation by being confined between acollar 82 which is a part of the stud and a collar 83 secured to the stud by a screw 84, sufficient clearance being provided to .allow the fingers to freely turn on the pivot stud. Each finger has a fluid passage '16 extending throughout the length thereof, and these passages are in registry with similar passages 11 leading from the periphery of the stud to an internal passage 18 which is provided with a suitable plug at the end 19. Another bore 85 is provided in the side wall of the stud and is in registry with the fluid passage leading from the valve 66.

Fluid is supplied to the nozzle by the pressure gear pump 25 through the condut 39 to a T 86 which has its horizontal leg passing through a cored slot in the bracket and threaded in a bore 81 which leads to the bore 44 in the nozzle support, thence to the passages 13 and. H where the valve 66 controls flow of the fluid to the extruding nozzle. If desired, a suitable pressure gage 88 may be connected to the vertical leg of the T 86, or it may be placed anywhere in the discharge line from the pump.

Referring to Fig. 8, the fingers 14 are provided with work contacting feet I81. and at the opposite end of the pivot they terminate with protruding ears 88 and 89'which limit the flexing or angular movement of the fingers on the pivot stud; 15 by engaging a stop pin 90 which isthreaded into the nozzle body.

. To keep the fingers biased towards the work, a lever 9 I. is pivoted on a stud 92 which is threaded in the body 60, one end of the lever being provided with a series of holes to receive the springs 93 and being splitv at right angles to the springholes so that the clamp screw 94 pulls the split parts together, cramping the springs in the holes. The opposite. end of the lever is arranged to contact the underface of an adjusting screw 95 which is threaded in the nozzle body, so that rotation of the screw 95 causes the lever to turn on its pivot and accordingly increase or decrease the-tension of the springs 93 which ride in grooves 96 cut in the edge of the fingers. I v n V a 7 To prevent rotation of the nozzle on its support 4|-- when in the operative position, an extension .9! is provided on the spring lever pivot,

stud 92, and this extension locates within a bore 98 drilled in the bracket 34. (Figs. 3 and 4.)

I00 having a'forked end |0| adapted to fork over the flatted end 61 of the nozzle valve. An operating lever I02 is secured to th'e'opposite end of the shaftfor' connection by means'of a clevis pin I03 to a forked plunger-"I04. This plunger is slidably engaged a bore provided a boss III- on the bracket, the boss having a sheu'ldr lflfi wh'ichretains a compression spring I01, the other end of which locatesin a counterbore in the plunger I04. A treadle conn'ecting rod I08 is threaded intothe plunger I04 and passes through the core of thespring and through a'clearance hole provided in the boss I05, check nuts I99 serving to mat e upward movement of the treadle" rod against its spring bias. The treadle rod at its lower end terminates in a clevis III) and is connected by a pin III to a treadle I I2 pivoted to'tl'ie support I!) at H3.

Most cements used in connection with'the type of machine described dry and harden very rapidly when exposed to the atmosphere, therefore asuitable solvent cup is provided to enclose the nozzle when the machine is not in use to prevent the cement in the extruding passages from hardening. This solvent cup' p'referably comprises a cup I having an arm I2I extending therefrom and terminating in a hub I22 having a bore therein to receive a' stud 123 secured to the frame of the machine. The complete solvent cup is therefore swingably mounted for movement towards and from the nozzle location, and the check nuts I24 serve to hold the cup and its arm from vertical movement, and also supply sufficient friction tothe hub-of the arm so as topi'event movement thereof by vibration. The cup is provided with a'cover I25 which is hinged to the cup at "I26, and a slot I21 (Fig. 4) is cut in the cover to allow clearance for the nozzle support when the cover is '"closed in the nozzlerec'eiving position. A cap I28 is hinged to the cover at I29 to cover the sl'otl2'I so as to exclude th atmosphere when the solvent cup isi'n the inoperative position as shown in Fig. 1.

In operation of the machine the motor is started to drive the pump andfeed wheel as previously described, and the work is held against the feed wheel and against the nozzle. The treadle is then depressed, causing'rot'ation of the valve lever which is in engagement with the nozzle valve, causing opening of-the fluid delivery line to the nozzle, and as the work is transported past the nozzle, fluid is applied to the work.

Upon reaching the limit of the coating application desired, the treadle is released and the spring IO'I causes the valve to close and the work is removed. Various types of work require that a different uncemented margin be left, and this can be controlled by simply turning the screw 58 which allows the nozzle to be spaced the desired distance from the periphery of the feed wheel.

Upon completion of the work at hand, the operator, in order to move the nozzle to its inoperative position, simply pulls the hand knob" 51 which withdraws the detent plunger 55 from engagement with the slot 5| of the nozzle support 4| allowing the spring 46 to move the nozzle support 4I.and the nozzle 5|] forwardly until the. .nuts 49 contact the stop plate 41, thus the stud rotated a clockwise direction to lower it into the cup and the cove'rl 25 is closed. V v

To remove the nozzle from the cup and restore the'noz'zle to its operative 'positio'n,'the above manipulations are'i'eversed, and then the nozzle is pushed toward the feed wheel until the'deten-t 55 catches in slot of the nozzle support.

Since certain changes may be made in the above construction and different embodiments of the invention could be made without'departing from the scope thereof, it is intended that all matter contained in the above description or shown in'the accompanying drawings shall be interpreted'a's illustrative and not in a limiting sense. i

ynaving described my invention, what I claim as new and desire to secure by Letters Patentis:

1. A fluid coating machine comprising, in combination, a receptacle for fluid having an extruding nozzle and cement delivery means connected thereto, a support for said nozzle, means for elevating said nozzle upon said support, a solvent cup pivotally mounted for positioning under said nozzle in its elevatedposition, and means for inserting and totally enclosing said nozzlein said cup without removing same from its support. I r

2. A fluid coating machine comprising, in combination, a. receptacle for fluid having an extruding nozzle and cement delivery means connected thereto, a "support for said nozzle, a solvent pup pivotally mounted on said cement receptacle for movement into the position-occupied by said nozzle, and means for elevating said nozzle upon said support and then inserting it in said cup Without ren'oo'ving" same from its support."

3. A fluid coating machine comprising, in combination, a frame, a receptacle for fluid, an extruding nozzle including a body and a valvepivotally mounted on a support slidable in said frame to an operative position and an inoperative position, valve operating means i'ournalledin the frame 'for connection with said nozzle when in operative position, a solvent cup mounted on thefranie formovement towards and from'said nozzle, means for moving said support and nozzle from the operative to the inoperative position to disconnect said valve operating means, and means for inserting the complete nozzle in said solvent cup without removing same from its support.

4. A fluid coating machine comprising, in combination, a frame, a cement receptacle mounted thereon, an extruding nozzle, a support for said nozzle slidably mounted on the frame between operative and inoperative positions, a stop at one end of said support defining the inoperative position, and means urging said support towards said stop.

5. A fluid coating machine comprising, in combination, a frame having a fluid receptacle secured thereto, an extruding nozzle support slidably mounted on said frame for movement between operative and inoperative positions, an extruding nozzle rotatably mounted on said supthe inoperative position, and means for latch ing said nozzle in the operative position.

7. A fluid coating machine comprising, in combination, a frame, an extruding nozzle comprising a body and valve, a support for said nozzle slidably mounted on said frame for movement to an operative position and an inoperative position, valve operating means journalled in the frame, means for connecting said valve operating means with said nozzle in its operative position, and means for moving said nozzle to the inoperative position to sever said connecting means.

8. A fluid coating machine comprising, in combination, a frame, an extruding nozzle slidably mounted on said frame for movement to anoper ative position and an inoperative positiongmeans urging said nozzle towards the inoperative posi-' tion, and means for retaining same in the operative position.

9. A fluid coating machine comprising, in combination, a frame, an extruding nozzle slidably mounted on said frame for movement to an operative position and an inoperative position, spring means urging said nozzle towards the inoperative position, means for retaining said nozzle in the operative position, and means for varying the distance between the operative and inoperative positions.

10.- A fluid coating machine comprising, in combination, a frame, an extruding nozzle slidably mounted on said frame for movement to an operative position and an inoperative position, means urging said nozzle towards the inoperative position, means for retaining said nozzle in the operative position, and means for varying both the operative and inoperative positions.

11. A fluid coating machine comprising, in combination, a frame, an extruding nozzle pivotally mounted on a support slidable in said frame to an operative position and an inoperative position, means allowingsaid nozzle to be rotated on its pivot at the inoperative position, and means to prevent rotation of said nozzle in the operative position.

12. A fluid coating machine comprising, in

combination, a cement receptacle, an extruding nozzle movable between operative and inoperative positions, means for transferring cement under pressure from said receptacle to said nozzle, a feed wheel for transporting a shoe past said nozzle, and means for moving the operative position of said nozzle to vary the spacing between the nozzle and feed wheel without affecting the inoperative position of said nozzle.

13. A fluid coating machine comprising, in combination, a cement receptacle, a rotatable feed wheel for transporting a shoe, an extruding nozzle slidably mounted for movement towards and from said feed wheel, means urging said nozzle away from the feed wheel, and means for restraining said urging means. 1

14. A fluid coating machine comprising, in combination, a frame, an extruding nozzle mounted on said frame and adapted to be elevated from its operative position, a solvent cup mounted above the operative position of said nozzle, secured on said frame for horizontal movement toward and from said nozzle, means for locking said nozzle in its operative position, and means for releasing said locking means to allow said nozzle to be elevated and said solvent cup moved thereunder.

15. A fluid coating machine comprising, in combination a frame, an extruding nozzle pivotally mounted on said frame for vertically swinging movement from an operative position to an inoperative position, means for locking said nozzle in the operative position, a solvent cup mounted on said frame for movement towards and away from said nozzle and having its side walls higher than the operative position of said nozzle, and means for releasing said locking means to allow said nozzle to be swung to the inoperative position above said solvent cup thereby allowing said solvent cup to be moved into position under said nozzle where the nozzle may be again swung on its pivot and completely enclosed in said solvent cup.

JOHN FREDERICK SMITH. 

